To use the Virtual Pag-IBIG guide calculator, visit the official Pag-IBIG website where you can find the tool. Enter your monthly salary or contribution amount, and it will help you estimate your Pag-IBIG contributions and potential benefits. This calculator is useful for planning your finances as an OFW. For specific inquiries or detailed guidance, it's best to consult with a licensed financial advisor or check directly with Pag-IBIG's official resources.